U.S. patent application number 17/732733 was filed with the patent office on 2022-08-11 for image capturing lens system, image capturing apparatus and electronic device.
The applicant listed for this patent is LARGAN PRECISION CO., LTD.. Invention is credited to Hsin-Hsuan Huang.
Application Number | 20220252846 17/732733 |
Document ID | / |
Family ID | 1000006300123 |
Filed Date | 2022-08-11 |
United States Patent
Application |
20220252846 |
Kind Code |
A1 |
Huang; Hsin-Hsuan |
August 11, 2022 |
IMAGE CAPTURING LENS SYSTEM, IMAGE CAPTURING APPARATUS AND
ELECTRONIC DEVICE
Abstract
An image capturing lens system, including, in order from an
object side to an image side: a first lens element with positive
refractive power having an object-side surface being convex
thereof; a second lens element having negative refractive power; a
third lens element; a fourth lens element; a fifth lens element
with negative refractive power having at least one of an
object-side surface and an image-side surface thereof being
aspheric and having at least one inflection point thereof; and a
sixth lens element with positive refractive power having both an
object-side surface and an image-side surface being convex thereof
and at least one of the object-side surface and the image-side
surface thereof being aspheric; wherein the image capturing lens
system has a total of six lens elements.
Inventors: |
Huang; Hsin-Hsuan;
(Taichung, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
LARGAN PRECISION CO., LTD. |
Taichung |
|
TW |
|
|
Family ID: |
1000006300123 |
Appl. No.: |
17/732733 |
Filed: |
April 29, 2022 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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17128589 |
Dec 21, 2020 |
11347033 |
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17732733 |
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16207335 |
Dec 3, 2018 |
10908394 |
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17128589 |
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15619687 |
Jun 12, 2017 |
10175460 |
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16207335 |
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14967894 |
Dec 14, 2015 |
9709776 |
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15619687 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02B 9/62 20130101; G02B
13/0045 20130101; G02B 13/02 20130101 |
International
Class: |
G02B 13/00 20060101
G02B013/00; G02B 9/62 20060101 G02B009/62; G02B 13/02 20060101
G02B013/02 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 20, 2015 |
TW |
104134322 |
Claims
1. An image capturing lens system, in order from an object side to
an image side comprising a first lens element, a second lens
element, a third lens element, a fourth lens element, a fifth lens
element and a sixth lens element; each of the six lens elements
having an object-side surface facing toward the object side and an
image-side surface facing toward the image side; wherein the first
lens element has positive refractive power, the second lens element
has negative refractive power, the object-side surface of the sixth
lens element is convex in a paraxial region thereof, at least one
of the object-side surface and image-side surface of at least one
of the six lens elements is aspheric, and at least one of the
object-side surface and image-side surface of at least one of the
six lens elements has at least one inflection point; wherein an
axial distance between the object-side surface of the first lens
element and an image surface is TL, a focal length of the image
capturing lens system is f, a focal length of the second lens
element is f2, a focal length of the third lens element is f3, a
focal length of the fourth lens element is f4, and following
conditions are satisfied: 0.85<TL/f<1.10; and
(|f/f3|+|f/f4|)/|f/f2|.ltoreq.0.66.
2. The image capturing lens system of claim 1, wherein the
object-side surface of the first lens element is convex in a
paraxial region thereof, the object-side surface of the second lens
element is convex in a paraxial region thereof and the image-side
surface of the second lens element is concave in a paraxial region
thereof.
3. The image capturing lens system of claim 1, wherein the
image-side surface of the first lens element is convex in a
paraxial region thereof.
4. The image capturing lens system of claim 1, wherein the
object-side surface of the third lens element is convex in a
paraxial region thereof and the image-side surface of the third
lens element is concave in a paraxial region thereof, and each of
the six lens elements is a single and non-cemented lens
element.
5. The image capturing lens system of claim 1, wherein the
object-side surface of the fourth lens element is convex in a
paraxial region thereof and the image-side surface of the fourth
lens element is concave in a paraxial region thereof, and each of
the six lens elements is made of plastic material.
6. The image capturing lens system of claim 1, wherein a maximum
refractive index among the first lens element, the second lens
element, the third lens element, the fourth lens element, the fifth
lens element and the sixth lens element is Nmax, and following
condition is satisfied: Nmax<1.70.
7. The image capturing lens system of claim 1, wherein the fifth
lens element has at least one inflection point, an entrance pupil
diameter of the image capturing lens system is EPD, a maximum image
height of the image capturing lens system is ImgH, and the
following condition is satisfied: 0.70<EPD/ImgH<1.50.
8. The image capturing lens system of claim 1, wherein an entrance
pupil diameter of the image capturing lens system is EPD, a maximum
image height of the image capturing lens system is ImgH, and the
following condition is satisfied: 1.04.ltoreq.EPD/ImgH<1.50.
9. The image capturing lens system of claim 1, wherein an entrance
pupil diameter of the image capturing lens system is EPD, a maximum
image height of the image capturing lens system is ImgH, and the
following condition is satisfied: 1.20.ltoreq.EPD/ImgH<1.50.
10. The image capturing lens system of claim 1, wherein an axial
distance between an aperture stop and the image-side surface of the
sixth lens element is SD, an axial distance between the object-side
surface of the first lens element and the image-side surface of the
sixth lens element is TD, and the following condition is satisfied:
0.70<SD/TD<1.0.
11. The image capturing lens system of claim 1, wherein an axial
distance between the image-side surface of the sixth lens element
and the image surface is BL, an axial distance between the
object-side surface of the first lens element and the image-side
surface of the sixth lens element is TD, and the following
condition is satisfied: 0<BL/TD<0.40.
12. The image capturing lens system of claim 1, wherein the focal
length of the image capturing lens system is f, and the following
condition is satisfied: 4.0 [mm]<f<12.0 [mm].
13. The image capturing lens system of claim 1, wherein a focal
length of the first lens element is f1, the focal length of the
second lens element is f2, the focal length of the third lens
element is f3, the focal length of the fourth lens element is f4, a
focal length of the fifth lens element is f5, a focal length of the
sixth lens element is f6, and the following conditions are
satisfied: |f1|<|f3|; |f1|<|f4|; |f1|<|f6|; |f2|<|f3|;
|f2|<|f4|; |f2|<|f6|; |f5|<|f3|; and |f5|<|f4|.
14. The image capturing lens system of claim 1, wherein the sixth
lens element has at least one inflection point, the focal length of
the image capturing lens system is f, the focal length of the
second lens element is f2, the focal length of the third lens
element is f3, the focal length of the fourth lens element is f4,
and the following condition is satisfied:
(|f/f3|+|f/f4|)/|f/f2|.ltoreq.0.50.
15. The image capturing lens system of claim 1, wherein the focal
length of the image capturing lens system is f, the focal length of
the second lens element is f2, the focal length of the third lens
element is f3, the focal length of the fourth lens element is f4,
and the following condition is satisfied:
(|f/f3|+|f/f4|)/|f/f2|.ltoreq.0.17.
16. The image capturing lens system of claim 1, further comprising
an aperture stop disposed between an imaged object and the first
lens element.
17. The image capturing lens system of claim 1, wherein an absolute
value of the focal length of the third lens element is a maximum
among absolute values of focal lengths of all the lens
elements.
18. The image capturing lens system of claim 1, wherein a central
thickness of the first lens element is a maximum among central
thicknesses of all the lens elements.
19. The image capturing lens system of claim 1, wherein a sign of a
focal length of the fifth lens element is different from a sign of
a focal length of the sixth lens element.
20. The image capturing lens system of claim 1, wherein the focal
length of the image capturing lens system is f, a maximum image
height of the image capturing lens system is ImgH, and the
following condition is satisfied: 2.35<f/ImgH.
21. The image capturing lens system of claim 1, wherein a half of
the maximal field of view of the image capturing lens system is
HFOV, and the following condition is satisfied:
0<tan(2*HFOV)<1.0.
22. An image capturing apparatus, comprising the image capturing
lens system of claim 1 and an image sensor disposed on the image
surface of the image capturing lens system.
23. An electronic device, comprising the image capturing apparatus
of claim 22.
Description
RELATED APPLICATIONS
[0001] This application is a continuation application of U.S.
application Ser. No. 17/128,589 filed on Dec. 21, 2020, now
approved, which is a divisional application of U.S. application
Ser. No. 16/207,335 filed on Dec. 3, 2018, now U.S. Pat. No.
10,908,394, which is a continuation application of U.S. application
Ser. No. 15/619,687 filed on Jun. 12, 2017, now U.S. Pat. No.
10,175,460, which is a continuation application of U.S. application
Ser. No. 14/967,894 filed on Dec. 14, 2015, now U.S. Pat. No.
9,709,776 and claims priority to Taiwan Application Serial Number
104134322, filed on Oct. 20, 2015, which is incorporated by
reference herein in its entirety.
BACKGROUND
Technical Field
[0002] The present disclosure relates to an image capturing lens
system and an image capturing apparatus, and more particularly, to
an image capturing lens system and an image capturing apparatus
applicable to electronic devices.
Description of Related Art
[0003] With the wide adoptions of the image capturing modules,
utilizing image capturing modules in various applications such as
smart consumer electronics, car devices and smart household
electronics has become a trend to the future development of
technology. Also, in order to obtain more extensive user
experiences, smart devices with multi-lens systems have become the
main stream in the market and thus various types of lens systems
with different characteristics are developed to meet the
requirements of various applications.
[0004] Currently, most compact lens systems adopted in the consumer
electronics focus on the imaging quality of macro and wide angle
photography. However, the optical designs of those lens systems
couldn't satisfy the need for telephoto photography. Most
conventional optical systems for telephoto adopt multi-lens
structures with spherical glass lenses which results in an overly
large lens system and a unit price being too high to be applied in
various products or devices. Therefore, the conventional optical
systems fail to meet the need of the current technology trend.
SUMMARY
[0005] According to one aspect of the present disclosure, an image
capturing lens system comprising, in order from an object side to
an image side: a first lens element with positive refractive power
having an object-side surface being convex thereof; a second lens
element having negative refractive power; a third lens element; a
fourth lens element; a fifth lens element with negative refractive
power having at least one of an object-side surface and an
image-side surface thereof being aspheric and having at least one
inflection point thereof; and a sixth lens element with positive
refractive power having both an object-side surface and an
image-side surface being convex thereof and at least one of the
object-side surface and the image-side surface thereof being
aspheric; wherein the image capturing lens system has a total of
six lens elements; wherein an axial distance between the image-side
surface of the sixth lens element and an image surface is BL, an
axial distance between the object-side surface of the first lens
element and the image-side surface of the sixth lens element is TD,
a focal length of the image capturing lens system is f, a curvature
radius of the object-side surface of the first lens element is R1,
an axial distance between the fifth lens element and the sixth lens
element is T56, a central thickness of the first lens element is
CT1, and the following conditions are satisfied:
0<BL/TD<0.40;
3.10<f/R1<7.50; and
T56<CT1.
[0006] According to another aspect of the present disclosure, an
image capturing lens system, comprising, in order from an object
side to an image side: a first lens element with positive
refractive power having an object-side surface being convex
thereof; a second lens element having negative refractive power; a
third lens element; a fourth lens element; a fifth lens element
with negative refractive power having an image-side surface being
concave, at least one of an object-side surface and the image-side
surface thereof being aspheric, and at least one inflection point
thereof; and a sixth lens element with positive refractive power
having an image-side surface being convex thereof and at least one
of an object-side surface and the image-side surface thereof being
aspheric; wherein the image capturing lens system has a total of
six lens elements; wherein an axial distance between the image-side
surface of the sixth lens element and an image surface is BL, an
axial distance between the object-side surface of the first lens
element and the image-side surface of the sixth lens element is TD,
a focal length of the image capturing lens system is f, a curvature
radius of the object-side surface of the first lens element is R1,
a curvature radius of the image-side surface of the fifth lens
element is R10, an axial distance between the fifth lens element
and the sixth lens element is T56, an axial distance between the
fourth lens element and the fifth lens element is T45, and the
following conditions are satisfied:
0<BL/TD<0.40;
3.10<f/R1<7.50;
0.50<f/R10; and
T56<T45.
[0007] According to yet another aspect of the present disclosure,
an image capturing apparatus is provided, which includes the
aforementioned image capturing lens system and an image sensor.
[0008] According to the other aspect of the present disclosure, an
electronic device is provided, which includes the aforementioned
image capturing apparatus.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1A is a schematic view of an image capturing apparatus
according to the 1st embodiment of the present disclosure;
[0010] FIG. 1B shows longitudinal spherical aberration curves,
astigmatic field curves and a distortion curve of the image
capturing apparatus according to the 1st embodiment;
[0011] FIG. 2A is a schematic view of an image capturing apparatus
according to the 2nd embodiment of the present disclosure;
[0012] FIG. 2B shows longitudinal spherical aberration curves,
astigmatic field curves and a distortion curve of the image
capturing apparatus according to the 2nd embodiment;
[0013] FIG. 3A is a schematic view of an image capturing apparatus
according to the 3rd embodiment of the present disclosure;
[0014] FIG. 3B shows longitudinal spherical aberration curves,
astigmatic field curves and a distortion curve of the image
capturing apparatus according to the 3rd embodiment;
[0015] FIG. 4A is a schematic view of an image capturing apparatus
according to the 4th embodiment of the present disclosure;
[0016] FIG. 4B shows longitudinal spherical aberration curves,
astigmatic field curves and a distortion curve of the image
capturing apparatus according to the 4th embodiment;
[0017] FIG. 5A is a schematic view of an image capturing apparatus
according to the 5th embodiment of the present disclosure;
[0018] FIG. 5B shows longitudinal spherical aberration curves,
astigmatic field curves and a distortion curve of the image
capturing apparatus according to the 5th embodiment;
[0019] FIG. 6A is a schematic view of an image capturing apparatus
according to the 6th embodiment of the present disclosure;
[0020] FIG. 6B shows longitudinal spherical aberration curves,
astigmatic field curves and a distortion curve of the image
capturing apparatus according to the 6th embodiment;
[0021] FIG. 7A is a schematic view of an image capturing apparatus
according to the 7th embodiment of the present disclosure;
[0022] FIG. 7B shows longitudinal spherical aberration curves,
astigmatic field curves and a distortion curve of the image
capturing apparatus according to the 7th embodiment;
[0023] FIG. 8A is a schematic view of an image capturing apparatus
according to the 8th embodiment of the present disclosure;
[0024] FIG. 8B shows longitudinal spherical aberration curves,
astigmatic field curves and a distortion curve of the image
capturing apparatus according to the 8th embodiment;
[0025] FIG. 9A shows an electronic device with an image capturing
apparatus of the present disclosure installed therein;
[0026] FIG. 9B shows another electronic device with an image
capturing apparatus of the present disclosure installed therein;
and
[0027] FIG. 9C shows yet another electronic device with an image
capturing apparatus of the present disclosure installed
therein.
DETAILED DESCRIPTION
[0028] The present disclosure provides an image capturing lens
system including, in order from an object side to an image side, a
first lens element, a second lens element, a third lens element, a
fourth lens element, a fifth lens element, and a sixth lens
element.
[0029] The first lens element has positive refractive power so as
to provide major focusing power for the image capturing lens system
and thus the size of the image capturing lens system can be
effectively controlled and the portability can be increased. The
first lens element has an object-side surface being convex in a
paraxial region, which is favorable for enhancing the positive
refractive power and further miniaturizing the lens system. The
first lens element may have an image-side surface being concave,
which can correct aberrations of the lens system.
[0030] The second lens element has negative refractive power so as
to correct chromatic aberration of the lens system. The second lens
element may have an object-side surface being concave for balancing
the positive refractive power of the first lens element.
[0031] The third lens element may have at least one inflection
point so as to correct aberrations in an off-axial region.
[0032] The fourth lens element may have positive or negative
refractive power in accordance with the configuration of the lens
system to correct aberrations and reduce the sensitivity of the
lens system.
[0033] The fifth lens element has negative refractive power, at
least one of an object-side surface and an image-side surface being
aspheric so as to form a symmetrical structure with the second lens
element to improve the symmetry of the lens system. The fifth lens
element further has at least one inflection point to correct
aberrations in an off-axial region to improve the image quality.
The image-side surface of the fifth lens element may be concave to
further strengthen the aberration correcting ability of the lens
system.
[0034] The sixth lens element has positive refractive power so as
to form a symmetrical structure with the first lens element to
improve the symmetry of the lens system. Both an object-side
surface and an image-side surface of the sixth lens element are
convex and there is at least one surface being aspheric so as to
correct aberrations in the off-axial region and therefore improve
the image quality.
[0035] The image capturing lens system has a total of six lens
elements. When an axial distance between the image-side surface of
the sixth lens element and an image surface is BL, an axial
distance between the object-side surface of the first lens element
and the image-side surface of the sixth lens element is TD, and the
following condition is satisfied: 0<BL/TD<0.40, the back
focus of the lens system can be effectively controlled and avoid an
excessive total track length.
[0036] When a focal length of the image capturing lens system is f,
a curvature radius of the object-side surface of the first lens
element is R1, and the following condition is satisfied:
3.10<f/R1<7.50, the lens system obtains the functionality of
telephoto and also effectively limits the total track length of the
lens system.
[0037] When an axial distance between the fifth lens element and
the sixth lens element is T56, a central thickness of the first
lens element is CT1, and the following condition is satisfied:
T56<CT1, the symmetrical structure of the first lens element and
the sixth lens element is enhanced so as to improve the symmetry of
the lens system for higher image quality
[0038] When the focal length of the image capturing lens system is
f, a curvature radius of the image-side surface of the fifth lens
element is R10, and the following condition is satisfied:
0.50<f/R10, the back focal length of the lens system can be
compressed and the volume of the lens system can be controlled to
avoid a waste of space. Preferably, the following condition is
satisfied: 1.0<f/R10.
[0039] When an axial distance between the fifth lens element and
the sixth lens element is T56, an axial distance between the fourth
lens element and the fifth lens element is T45, and the following
condition is satisfied: T56<T45, a more appropriate arrangement
of the fifth lens system is provided to correct aberrations of the
lens system. Preferably, the following condition is satisfied:
T56/T45<0.6. T45 may be the largest among all axial distances
between any two adjacent lens elements of the first lens element,
the second lens element, the third lens element, the fourth lens
element, the fifth lens element, and the sixth lens element in the
image capturing lens system to provide excellent telephoto
performance.
[0040] The image capturing lens system can further comprise an
aperture stop disposed between an imaged object and the third lens
element and the properties between telecentric effect and wide
angle of view of the lens system are balanced thereby.
[0041] Each of the first lens element, the second lens element, the
third lens element, the fourth lens element, the fifth lens
element, and the sixth lens element may be a single and
non-cemented lens element to avoid adverse influences from the
cementing process.
[0042] When an Abbe number of the sixth lens element is V6 and the
following condition is satisfied: V6<30, chromatic aberration of
the lens system can be balanced and thus better image quality can
be obtained.
[0043] When a curvature radius of the object-side surface of the
sixth lens element is R11, a curvature radius of the image-side
surface of the sixth lens element is R12, and the following
condition is satisfied: -1.0<(R11+R12)/(R11-R12)<1.0,
spherical aberration can be reduced in order to maintain better
image quality.
[0044] When a curvature radius of the object-side surface of the
third lens element is R5, a curvature radius of the image-side
surface of the third lens element is R6, and the following
condition is satisfied: -1.0<(R5-R6)/(R5+R6)<1.0, aberrations
of the lens system are reduced thereby.
[0045] When an entrance pupil diameter of the image capturing lens
system is EPD, a maximum image height of the image capturing lens
system is ImgH, and the following condition is satisfied:
0.70<EPD/ImgH<1.50, the ratio of the incident light range and
the image forming area can be balanced in order to provide
sufficient light for the lens system and improve the image
brightness.
[0046] When an axial distance between the object-side surface of
the first lens element and the image surface is TL, the focal
length of the image capturing lens system is f, and the following
condition is satisfied: 0.85<TL/f<1.10, the angle of the view
is effectively controlled for better telephoto imaging.
[0047] When a vertical distance between a critical point on the
image-side surface of the fifth lens element and an optical axis is
Yc52, the focal length of the image capturing lens system is f, and
the following condition is satisfied: 0.05<Yc52/f<0.50,
Petzval's sum can be corrected and the image quality of the field
in an off-axial region is improved.
[0048] When the focal length of the image capturing lens system is
f and the following condition is satisfied: 4.0 mm<f<12.0 mm,
the image capturing lens system can be more compact thereby.
[0049] When the focal length of the image capturing lens system is
f, the maximum image height of the image capturing lens system is
ImgH, and the following condition is satisfied: 2.35<f/ImgH, the
imaged region is controlled and the resolution of the image is
improved.
[0050] When the focal length of the image capturing lens system is
f, a focal length of the third lens element is f3, a focal length
of the fourth lens element is f4, a focal length of the second lens
element is f2, and the following condition is satisfied:
(|f/f3|+|f/f4|)/|f/f2|<1.0, the refractive power of the third
lens element and the fourth lens element are more appropriate and
aberrations of the lens system can be corrected thereby.
[0051] The first lens element, the second lens element, the third
lens element, the fourth lens element, the fifth lens element and
the sixth lens element can be made of plastic material so as to
reduce the production cost and increase the productivity of the
lens elements.
[0052] When a maximum refractive index among the first lens
element, the second lens element, the third lens element, the
fourth lens element, the fifth lens element and the sixth lens
element is Nmax, and the following condition is satisfied:
Nmax<1.70, a better arrangement of the materials of the lens
elements can be obtained and the distribution of the refractive
power of each the lens element is balanced thereby.
[0053] All the object-side surfaces and image-side surfaces of the
first lens element, the second lens element, the third lens
element, the fourth lens element, the fifth lens element and the
sixth lens element may be aspheric to enlarge the degree of freedom
in design and improve the aberration correcting ability of the lens
system.
[0054] When a half of the maximal field of view of the image
capturing lens system is HFOV, and the following condition is
satisfied: 0<tan(2*HFOV)<1.0, the imaged region can be
effectively controlled and a good telephoto imaging ability is
provided thereby and hence the need of better telephoto imaging can
be fulfilled.
[0055] When an Abbe number of the first lens element is V1, an Abbe
number of the second lens element is V2, an Abbe number of the
third lens element is V3, and the following condition is satisfied:
(V2+V3)/V1<1.0, the chromatic aberration of the lens system can
be corrected and hence the image quality can be improved
thereby.
[0056] When a focal length of the first lens element is f1, the
focal length of the second lens element is f2, the focal length of
the third lens element is f3, the focal length of the fourth lens
element is f4, a focal length of the fifth lens element is f5, a
focal length of the sixth lens element is f6, and |f1|, f2| and
|f5| are smaller than |f3|, |f4| and |f6|, the refractive power
distribution of the entire lens system is more suitable for
telephoto imaging with better imaging results.
[0057] When an axial distance between the aperture stop and the
image-side surface of the sixth lens element is SD, the axial
distance between the object-side surface of the first lens element
and the image-side surface of the sixth lens element is TD, and the
following conditions are satisfied, 0.70<SD/TD<1.0, the
properties between telecentric effect and wide angle of view of the
lens system are balanced thereby.
[0058] When an axial distance between the first lens element and
the second lens element is T12, the axial distance between the
fifth lens element and the sixth lens element is T56, an axial
distance between the second lens element and the third lens element
is T23, an axial distance between the third lens element and the
fourth lens element is T34, the axial distance between the fourth
lens element and the fifth lens element is T45, and the following
conditions are satisfied: (T12+T56)/(T23+T34+T45)<0.30, the
arrangement of the first lens element and the sixth lens element in
the lens system is more appropriate and a better symmetry of the
lens system is provided thereby.
[0059] When the curvature radius of the object-side surface of the
first lens element is R1, a curvature radius of the image-side
surface of the sixth lens element is R12, and the following
condition is satisfied: -1.0<(R1+R12)/(R1-R12)<0, the
curvature radius of the object-side surface of the first lens
element and the image-side surface of the sixth lens element are
more appropriate and the symmetry of the lens system is further
improved thereby.
[0060] When an axial distance between the object-side surface of
the first lens element and the image surface is TL, a vertical
distance between a maximum effective diameter position on the
image-side surface of the sixth lens element and an optical axis is
Y62, a vertical distance between a maximum effective diameter
position on the object-side surface of the first lens element and
the optical axis is Y11, and the following condition is satisfied:
5.5<TL/(Y62-Y11)<12.0, a localized image resolution of
telephoto is enhanced for usage in more aspects of
applications.
[0061] According to the image capturing lens system of the present
disclosure, the lens elements thereof can be made of glass or
plastic material. When the lens elements are made of glass
material, the distribution of the refractive power of the image
capturing lens system may be more flexible to design. When the lens
elements are made of plastic material, the manufacturing cost can
be effectively reduced. Furthermore, surfaces of each lens element
can be arranged to be aspheric (ASP). Since these aspheric surfaces
can be easily formed into shapes other than spherical shapes so as
to have more controllable variables for eliminating aberrations and
to further decrease the required number of lens elements, the total
track length of the image capturing lens system can be effectively
reduced.
[0062] According to the image capturing lens system of the present
disclosure, the image capturing lens system can include at least
one stop, such as an aperture stop, a glare stop or a field stop,
so as to favorably reduce the amount of stray light and thereby to
improve the image quality.
[0063] According to the image capturing lens system of the present
disclosure, an aperture stop can be configured as a front stop or a
middle stop. A front stop disposed between an imaged object and the
first lens element can provide a longer distance between an exit
pupil of the image capturing lens system and the image surface, so
that the generated telecentric effect can improve the image-sensing
efficiency of an image sensor, such as a CCD or CMOS sensor. A
middle stop disposed between the first lens element and the image
surface is favorable for enlarging the field of view of the image
capturing lens system, thereby providing the image capturing lens
system the advantages of a wide-angle lens.
[0064] According to the image capturing lens system of the present
disclosure, when the lens element has a convex surface and the
region of convex shape is not defined, it indicates that the
surface can be convex in the paraxial region thereof. When the lens
element has a concave surface and the region of concave shape is
not defined, it indicates that the surface can be concave in the
paraxial region thereof. Likewise, when the region of refractive
power or focal length of a lens element is not defined, it
indicates that the region of refractive power or focal length of
the lens element can be in the paraxial region thereof.
[0065] According to the image capturing lens system of the present
disclosure, the image surface of the image capturing lens system,
based on the corresponding image sensor, can be a plane or a curved
surface with any curvature, especially a curved surface being
concave facing towards the object side.
[0066] The image capturing lens system of the present disclosure
can be optionally applied to moving focus optical systems.
According to the image capturing lens system of the present
disclosure, the image capturing lens system features a good
correction capability and high image quality, and can be applied to
3D (three-dimensional) image capturing applications and electronic
devices, such as digital cameras, mobile devices, digital tablets,
smart TV, network surveillance devices, motion sensing input
devices, driving recording systems, rear view camera systems, and
wearable devices.
[0067] According to the present disclosure, an image capturing
apparatus is provided, which includes the aforementioned image
capturing lens system and the image sensor, wherein the image
sensor is disposed on or near an image surface of the image
capturing lens system. Therefore, the design of the image capturing
lens system enables the image capturing apparatus to achieve the
best image quality. Preferably, the image capturing lens system can
further include a barrel member, a holder member or a combination
thereof.
[0068] Referring to FIG. 9A, FIG. 9B and FIG. 9C, an image
capturing apparatus 901 may be installed in an electronic device
including, but not limited to, a smartphone 910, a tablet personal
computer 920 or a wearable device 930. The three exemplary figures
of different electronic devices are only exemplary for showing the
image capturing apparatus of the present disclosure installed in an
electronic device, and the present disclosure is not limited
thereto. Preferably, the electronic device can further include a
control unit, a display unit, a storage unit, a random access
memory unit (RAM) or a combination thereof.
[0069] According to the above description of the present
disclosure, the following 1st-8th specific embodiments are provided
for further explanations.
1st Embodiment
[0070] FIG. 1A is a schematic view of an image capturing apparatus
according to the 1st embodiment of the present disclosure. FIG. 1B
shows, in order from left to right, longitudinal spherical
aberration curves, astigmatic field curves and a distortion curve
of the image capturing apparatus according to the 1st
embodiment.
[0071] In FIG. 1A, the image capturing apparatus includes an image
capturing lens system (not otherwise herein labeled) of the present
disclosure and an image sensor 190. The image capturing lens system
includes, in order from an object side to an image side, an
aperture stop 100, a first lens element 110, a second lens element
120, a third lens element 130, a fourth lens element 140, a fifth
lens element 150, and a sixth lens element 160.
[0072] The first lens element 110 with positive refractive power
has an object-side surface 111 being convex in a paraxial region
thereof and an image-side surface 112 being concave in a paraxial
region thereof, which are both aspheric, and the first lens element
110 is made of plastic material.
[0073] The second lens element 120 with negative refractive power
has an object-side surface 121 being concave in a paraxial region
thereof and an image-side surface 122 being concave in a paraxial
region thereof, which are both aspheric, and the second lens
element 120 is made of plastic material.
[0074] The third lens element 130 with positive refractive power
has an object-side surface 131 being convex in a paraxial region
thereof and an image-side surface 132 being concave in a paraxial
region thereof, which are both aspheric and have inflection points.
The third lens element 130 is made of plastic material.
[0075] The fourth lens element 140 with positive refractive power
has an object-side surface 141 being concave in a paraxial region
thereof and an image-side surface 142 being convex in a paraxial
region thereof, which are both aspheric, and the fourth lens
element 140 is made of plastic material.
[0076] The fifth lens element 150 with negative refractive power
has an object-side surface 151 being concave in a paraxial region
thereof and an image-side surface 152 being concave in a paraxial
region thereof, which are both aspheric and have inflection points.
The fifth lens element 150 is made of plastic material.
[0077] The sixth lens element 160 with positive refractive power
has an object-side surface 161 being convex in a paraxial region
thereof and an image-side surface 162 being convex in a paraxial
region thereof, which are both aspheric, and the sixth lens element
160 is made of plastic material.
[0078] The image capturing lens system further includes an IR cut
filter 170 located between the sixth lens element 160 and an image
surface 180. The IR cut filter 170 is made of glass material and
will not affect the focal length of the image capturing lens
system. The image sensor 190 is disposed on or near the image
surface 180 of the image capturing lens system.
[0079] The detailed optical data of the 1st embodiment are shown in
TABLE 1, and the aspheric surface data are shown in TABLE 2,
wherein the units of the curvature radius, the thickness and the
focal length are expressed in mm, and HFOV is a half of the maximal
field of view.
TABLE-US-00001 TABLE 1 (1st Embodiment) f = 6.20 mm, Fno = 2.60,
HFOV = 20.8 deg. Surface # Curvature Radius Thickness Material
Index Abbe # Focal Length 0 Object Plano Infinity 1 Ape. Stop Plano
-0.556 2 Lens 1 1.564 ASP 0.930 Plastic 1.544 56.0 2.99 3 31.758
ASP 0.186 4 Lens 2 -44.351 ASP 0.250 Plastic 1.639 23.5 -4.64 5
3.205 ASP 0.527 6 Lens 3 9.663 ASP 0.338 Plastic 1.544 56.0 1607.98
7 9.650 ASP 0.331 8 Lens 4 -18.268 ASP 0.396 Plastic 1.639 23.5
42.17 9 -10.977 ASP 0.876 10 Lens 5 -10.622 ASP 0.331 Plastic 1.544
56.0 -4.63 11 3.341 ASP 0.127 12 Lens 6 22.127 ASP 0.884 Plastic
1.639 23.5 16.79 13 -20.470 ASP 0.300 14 IR Cut Filter Plano 0.210
Glass 1.517 64.2 15 Plano 0.216 16 Image Surface Plano Note:
Reference wavelength is d-line 587.6 nm
TABLE-US-00002 TABLE 2 Aspheric Coefficients Surface # 2 3 4 5 k=
-1.0422E-01 6.3260E+01 -7.3778E+01 -1.1468E+00 A4= 5.9279E-03
-2.7661E-02 -1.0725E-01 -4.4849E-02 A6= -3.8975E-03 -9.6731E-03
1.9351E-01 2.7318E-01 A8= 1.4508E-02 2.0694E-01 1.2238E-01
-7.4407E-02 A10= -1.1007E-02 -3.3157E-01 -5.4985E-01 -1.2947E-01
A12= 5.2654E-03 2.3573E-01 4.9928E-01 9.0637E-02 A14= -6.7427E-02
-1.6523E-01 Surface # 6 7 8 9 k= 3.3839E+01 6.3338E+01 3.9095E+01
3.4521E+01 A4= -7.8106E-03 3.8423E-03 -1.2216E-02 -2.6235E-03 A6=
6.4730E-02 6.0197E-02 4.2458E-03 -1.0102E-03 A8= 1.2900E-01
6.8136E-02 9.3324E-05 5.0678E-04 A10= -2.3188E-01 -1.1957E-01
1.3554E-04 -2.2581E-06 A12= 1.5174E-01 8.6201E-02 A14= -4.1142E-02
-3.0009E-02 Surface # 10 11 12 13 k= 3.7259E+01 1.1170E-01
-9.0000E+01 7.3132E+01 A4= -1.3650E-01 -1.7920E-01 -8.3888E-02
-8.3507E-02 A6= -3.1139E-02 4.1315E-02 9.4433E-02 7.6778E-02 A8=
8.0188E-02 3.1426E-02 -4.8400E-02 -3.3033E-02 A10= -3.5736E-02
-2.7518E-02 1.3883E-02 8.0335E-03 A12= 3.1094E-03 8.8466E-03
-2.3698E-03 -1.1644E-03 A14= 1.6580E-03 -1.3770E-03 2.2308E-04
9.3121E-05 A16= -3.1116E-04 8.6696E-05 -8.8134E-06 -3.0641E-06
[0080] The equation of the aspheric surface profiles is expressed
as follows:
X .function. ( Y ) = ( Y 2 / R ) / ( 1 + s .times. q .times. r
.times. t .function. ( 1 .times. ( 1 + k ) * ( Y / R ) 2 ) ) + i (
Ai ) * ( Y i ) ##EQU00001##
[0081] where:
[0082] X is the relative distance between a point on the aspheric
surface spaced at a distance Y from the optical axis and the
tangential plane at the aspheric surface vertex on the optical
axis;
[0083] Y is the vertical distance from the point on the aspheric
surface profile to the optical axis;
[0084] R is the curvature radius;
[0085] k is the conic coefficient; and
[0086] Ai is the i-th aspheric coefficient.
[0087] In the 1st embodiment, a focal length of the image capturing
lens system is f, an f-number of the image capturing lens system is
Fno, a half of a maximal field of view of the image capturing lens
system is HFOV, and these parameters have the following values:
f=6.20 mm; Fno=2.60; and HFOV=20.8 degrees.
[0088] In the 1st embodiment, an Abbe number of the sixth lens
element is V6, and it satisfies the condition: V6=23.5.
[0089] In the 1st embodiment, an Abbe number of the second lens
element is V2, an Abbe number of the third lens element is V3, an
Abbe number of the first lens element is V1, and they satisfy the
condition: (V2+V3)/V1=1.42.
[0090] In the 1st embodiment, a maximum refractive index among the
first lens element, the second lens element, the third lens
element, the fourth lens element, the fifth lens element and the
sixth lens element is Nmax, and it satisfies: Nmax=1.639.
[0091] In the 1st embodiment, an axial distance between the fifth
lens element and the sixth lens element is T56, an axial distance
between the fourth lens element and the fifth lens element is T45,
and they satisfy the condition: T56/T45=0.14.
[0092] In the 1st embodiment, an axial distance between the first
lens element and the second lens element is T12, the axial distance
between the fifth lens element and the sixth lens element is T56,
an axial distance between the second lens element and the third
lens element is T23, an axial distance between the third lens
element and the fourth lens element is T34, the axial distance
between the fourth lens element and the fifth lens element is T45,
and they satisfy the condition: (T12+T56)/(T23+T34+T45)=0.18.
[0093] In the 1st embodiment, the focal length of the image
capturing lens system is f, a curvature radius of the object-side
surface of the first lens element is R1, and they satisfy the
condition: f/R1=3.96.
[0094] In the 1st embodiment, the focal length of the image
capturing lens system is f, a curvature radius of the image-side
surface of the fifth lens element is R10, and they satisfy the
condition: f/R10=1.86.
[0095] In the 1st embodiment, the curvature radius of the
object-side surface of the first lens element is R1, a curvature
radius of the image-side surface of the sixth lens element is R12,
and they satisfy the condition: (R1+R12)/(R1-R12)=-0.86.
[0096] In the 1st embodiment, a curvature radius of the object-side
surface of the third lens element is R5, a curvature radius of the
image-side surface of the third lens element is R6, and they
satisfy the condition: (R5-R6)/(R5+R6)=0.0006.
[0097] In the 1st embodiment, a curvature radius of the object-side
surface of the sixth lens element is R11, the curvature radius of
the image-side surface of the sixth lens element is R12, and they
satisfy the condition: (R11+R12)/(R11-R12)=0.04.
[0098] In the 1st embodiment, the focal length of the image
capturing lens system is f, a focal length of the third lens
element is f3, a focal length of the fourth lens element is f4, a
focal length of the second lens element is f2, and they satisfy the
condition: (|f/f3|+|f/f4|)/|f/f2|=0.11.
[0099] In the 1st embodiment, a vertical distance between a
critical point on the image-side surface of the fifth lens element
and an optical axis is Yc52, the focal length of the image
capturing lens system is f, and they satisfy the condition:
Yc52/f=0.12.
[0100] In the 1st embodiment, an axial distance between the
object-side surface of the first lens element and the image surface
is TL, the focal length of the image capturing lens system is f,
and they satisfy the condition: TL/f=0.95.
[0101] In the 1st embodiment, an axial distance between the
aperture stop and the image-side surface of the sixth lens element
is SD, an axial distance between the object-side surface of the
first lens element and the image-side surface of the sixth lens
element is TD, and they satisfy the condition: SD/TD=0.89.
[0102] In the 1st embodiment, an axial distance between the
image-side surface of the sixth lens element and the image surface
is BL, the axial distance between the object-side surface of the
first lens element and the image-side surface of the sixth lens
element is TD, and they satisfy the condition: BL/TD=0.14.
[0103] In the 1st embodiment, the focal length of the image
capturing lens system is f, a maximum image height of the image
capturing lens system is ImgH, and they satisfy f/ImgH=2.55.
[0104] In the 1st embodiment, an entrance pupil diameter of the
image capturing lens system is EPD, the maximum image height of the
image capturing lens system is ImgH, and they satisfy
EPD/ImgH=0.98.
[0105] In the 1st embodiment, the half of the maximal field of view
of the image capturing lens system is HFOV, and it satisfies the
condition: tan(2*HFOV)=0.89.
[0106] In the 1st embodiment, an axial distance between the
object-side surface of the first lens element and the image surface
is TL, a vertical distance between a maximum effective diameter
position on the image-side surface of the sixth lens element and
the optical axis is Y62, a vertical distance between a maximum
effective diameter position on the object-side surface of the first
lens element and the optical axis is Y11, and they satisfy the
condition: TL/(Y62-Y11)=6.17.
2nd Embodiment
[0107] FIG. 2A is a schematic view of an image capturing apparatus
according to the 2nd embodiment of the present disclosure. FIG. 2B
shows, in order from left to right, longitudinal spherical
aberration curves, astigmatic field curves and a distortion curve
of the image capturing apparatus according to the 2nd
embodiment.
[0108] In FIG. 2A, the image capturing apparatus includes an image
capturing lens system (not otherwise herein labeled) of the present
disclosure and an image sensor 290. The image capturing lens system
includes, in order from an object side to an image side, an
aperture stop 200, a first lens element 210, a second lens element
220, a third lens element 230, a fourth lens element 240, a fifth
lens element 250, and a sixth lens element 260.
[0109] The first lens element 210 with positive refractive power
has an object-side surface 211 being convex in a paraxial region
thereof and an image-side surface 212 being convex in a paraxial
region thereof, which are both aspheric, and the first lens element
210 is made of plastic material.
[0110] The second lens element 220 with negative refractive power
has an object-side surface 221 being concave in a paraxial region
thereof and an image-side surface 222 being concave in a paraxial
region thereof, which are both aspheric, and the second lens
element 220 is made of plastic material.
[0111] The third lens element 230 with positive refractive power
has an object-side surface 231 being convex in a paraxial region
thereof and an image-side surface 232 being concave in a paraxial
region thereof, which are both aspheric and have inflection points.
The third lens element 230 is made of plastic material.
[0112] The fourth lens element 240 with negative refractive power
has an object-side surface 241 being convex in a paraxial region
thereof and an image-side surface 242 being concave in a paraxial
region thereof, which are both aspheric, and the fourth lens
element 240 is made of plastic material.
[0113] The fifth lens element 250 with negative refractive power
has an object-side surface 251 being concave in a paraxial region
thereof and an image-side surface 252 being concave in a paraxial
region thereof, which are both aspheric and have inflection points.
The fifth lens element 250 is made of plastic material.
[0114] The sixth lens element 260 with positive refractive power
has an object-side surface 261 being convex in a paraxial region
thereof and an image-side surface 262 being convex in a paraxial
region thereof, which are both aspheric, and the sixth lens element
260 is made of plastic material.
[0115] The image capturing lens system further includes an IR cut
filter 270 located between the sixth lens element 260 and an image
surface 280. The IR cut filter 270 is made of glass material and
will not affect the focal length of the image capturing lens
system. The image sensor 290 is disposed on or near the image
surface 280 of the image capturing lens system.
[0116] The detailed optical data of the 2nd embodiment are shown in
TABLE 3, and the aspheric surface data are shown in TABLE 4,
wherein the units of the curvature radius, the thickness and the
focal length are expressed in mm, and HFOV is a half of the maximal
field of view.
TABLE-US-00003 TABLE 3 (2nd Embodiment) f = 11.18 mm, Fno = 2.91,
HFOV = 18.9 deg, Surface # Curvature Radius Thickness Material
Index Abbe # Focal Length 0 Object Plano Infinity 1 Ape. Stop Plano
-0.700 2 Lens 1 2.772 ASP 1.657 Plastic 1.544 55.9 4.65 3 -23.142
ASP 0.330 4 Lens 2 -19.621 ASP 0.411 Plastic 1.639 23.5 -6.18 5
4.989 ASP 0.846 6 Lens 3 13.439 ASP 0.571 Plastic 1.639 23.5 116.00
7 16.143 ASP 0.581 8 Lens 4 12.429 ASP 0.796 Plastic 1.544 55.9
-52.36 9 8.459 ASP 1.133 10 Lens 5 -34.265 ASP 0.847 Plastic 1.544
55.9 -8.82 11 5.627 ASP 0.252 12 Lens 6 16.343 ASP 1.806 Plastic
1.639 23.5 21.67 13 -86.775 ASP 0.493 14 IR Cut Filter Plano 0.345
Glass 1.517 64.2 15 Plano 0.502 16 Image Surface Plano -- Note:
Reference wavelength is d-line 587.6 nm
TABLE-US-00004 TABLE 4 Aspheric Coefficients Surface # 2 3 4 5 k=
-1.1097E-01 -9.0000E+01 -7.8353E+01 -1.6827E+00 A4= 4.3036E-04
-5.9464E-03 -2.3947E-02 -1.0088E-02 A6= -2.5886E-04 -7.4234E-04
1.6162E-02 2.1448E-02 A8= 4.3189E-04 6.3862E-03 3.7462E-03
-2.3871E-03 A10= -1.3036E-04 -3.7798E-03 -6.2693E-03 -1.4936E-03
A12= 1.9938E-05 9.9761E-04 2.1063E-03 3.1563E-04 A14= -1.0236E-04
-2.5012E-04 Surface # 6 7 8 9 k= 2.6884E+01 6.2618E+01 2.2077E+01
1.1334E+01 A4= -1.9569E-03 -1.0129E-03 5.0144E-04 7.4208E-04 A6=
5.3194E-03 4.9980E-03 4.6541E-04 8.8773E-05 A8= 3.8794E-03
2.1411E-03 5.5222E-06 A10= -2.6605E-03 -1.3415E-03 A12= 6.4124E-04
3.5851E-04 A14= -6.4388E-05 -4.8252E-05 Surface # 10 11 12 13 k=
6.1920E+00 9.5456E-01 -5.0754E+01 9.0000E+01 A4= -2.9928E-02
-4.0209E-02 -1.9647E-02 -2.0453E-02 A6= -3.1683E-03 3.2127E-03
7.6900E-03 6.4154E-03 A8= 2.5016E-03 9.6653E-04 -1.4406E-03
-1.0130E-03 A10= -4.033 IE-04 .sup. -3.1184E-04 1.5382E-04
9.0971E-05 A12= 1.3479E-05 3.7544E-05 -9.9307E-06 -4.9274E-06 A14=
2.7139E-06 -2.1447E-06 3.4577E-07 1.4562E-07 A16= -1.2225E-07
4.7091E-08 -5.3157E-09 -1.7985E-09
[0117] In the 2nd embodiment, the equation of the aspheric surface
profiles of the aforementioned lens elements is the same as the
equation of the 1st embodiment. Also, the definitions of these
parameters shown in TABLE 5 below are the same as those stated in
the 1st embodiment with corresponding values for the 2nd
embodiment, so an explanation in this regard will not be provided
again.
[0118] Moreover, these parameters can be calculated from TABLE 3
and TABLE 4 and satisfy the conditions stated in TABLE 5.
TABLE-US-00005 TABLE 5 2nd Embodiment f [mm] 11.18 (R5 - R6)/(R5 +
R6) -0.09 Fno 2.91 (R11 + R12)/(R11 - R12) -0.68 HFOV [deg.] 18.9
(|f/f3| + |f/f4|)/|f/f2| 0.17 V6 23.5 Yc52/f 0.11 (V2+V3)/V1 0.84
TL/f 0.95 Nmax 1.639 SD/TD 0.92 T56/T45 0.22 BL/TD 0.15 (T12 +
T56)/(T23 + T34 + T45) 0.23 f/ImgH 2.80 f/R1 4.03 EPD/ImgH 0.96
f/R10 1.99 tan(2*HFOV) 0.78 (R1 + R12)/(R1 - R12) -0.94 TL/(Y62 -
Y11) 6.42
3rd Embodiment
[0119] FIG. 3A is a schematic view of an image capturing apparatus
according to the 3rd embodiment of the present disclosure. FIG. 3B
shows, in order from left to right, longitudinal spherical
aberration curves, astigmatic field curves and a distortion curve
of the image capturing apparatus according to the 3rd
embodiment.
[0120] In FIG. 3A, the image capturing apparatus includes an image
capturing lens system (not otherwise herein labeled) of the present
disclosure and an image sensor 390. The image capturing lens system
includes, in order from an object side to an image side, an
aperture stop 300, a first lens element 310, a second lens element
320, a third lens element 330, a fourth lens element 340, a fifth
lens element 350, and a sixth lens element 360.
[0121] The first lens element 310 with positive refractive power
has an object-side surface 311 being convex in a paraxial region
thereof and an image-side surface 312 being concave in a paraxial
region thereof, which are both aspheric, and the first lens element
310 is made of plastic material.
[0122] The second lens element 320 with negative refractive power
has an object-side surface 321 being convex in a paraxial region
thereof and an image-side surface 322 being concave in a paraxial
region thereof, which are both aspheric, and the second lens
element 320 is made of plastic material.
[0123] The third lens element 330 with negative refractive power
has an object-side surface 331 being concave in a paraxial region
thereof and an image-side surface 332 being concave in a paraxial
region thereof, which are both aspheric. The third lens element 330
is made of plastic material and has inflection points on the
object-side surface 331 thereof.
[0124] The fourth lens element 340 with positive refractive power
has an object-side surface 341 being convex in a paraxial region
thereof and an image-side surface 342 being concave in a paraxial
region thereof, which are both aspheric, and the fourth lens
element 340 is made of plastic material.
[0125] The fifth lens element 350 with negative refractive power
has an object-side surface 351 being convex in a paraxial region
thereof and an image-side surface 352 being concave in a paraxial
region thereof, which are both aspheric and have inflection points.
The fifth lens element 350 is made of plastic material.
[0126] The sixth lens element 360 with positive refractive power
has an object-side surface 361 being convex in a paraxial region
thereof and an image-side surface 362 being convex in a paraxial
region thereof, which are both aspheric, and the sixth lens element
360 is made of plastic material.
[0127] The image capturing lens system further includes an IR cut
filter 370 located between the sixth lens element 360 and an image
surface 380. The IR cut filter 370 is made of glass material and
will not affect the focal length of the image capturing lens
system. The image sensor 390 is disposed on or near the image
surface 380 of the image capturing lens system.
[0128] The detailed optical data of the 3rd embodiment are shown in
TABLE 6, and the aspheric surface data are shown in TABLE 7,
wherein the units of the curvature radius, the thickness and the
focal length are expressed in mm, and HFOV is a half of the maximal
field of view.
TABLE-US-00006 TABLE 6 (3rd Embodiment) f = 10.64 mm, Fno = 2.90,
HFOV = 19.0 deg, Surface # Curvature Radius Thickness Material
Index Abbe # Focal Length 0 Object Plano Infinity 1 Ape. Stop Plano
-0.667 2 Lens 1 2.741 ASP 1.639 Plastic 1.544 55.9 5.60 3 21.578
ASP 0.239 4 Lens 2 20.669 ASP 0.250 Plastic 1.639 23.5 -12.17 5
5.624 ASP 0.706 6 Lens 3 -76.923 ASP 0.412 Plastic 1.639 23.5
-26.77 7 22.046 ASP 0.134 8 Lens 4 13.247 ASP 2.200 Plastic 1.544
55.9 47.25 9 25.73 ASP 1.216 10 Lens 5 19.706 ASP 0.694 Plastic
1.544 55.9 -8.57 11 3.725 ASP 0.202 12 Lens 6 25.794 ASP 1.764
Plastic 1.639 23.5 31.43 13 -88.339 ASP 0.493 14 IR Cut Filter
Plano 0.345 Glass 1.517 64.2 15 Plano 0.380 16 Image Surface Plano
-- Note: Reference wavelength is d-line 587.6 nm
TABLE-US-00007 TABLE 7 Aspheric Coefficients Surface # 2 3 4 5 k=
-5.8950E-02 9.0000E+01 8.9799E+01 -1.4641E+00 A4= 1.5890E-03
-5.2939E-03 -2.3016E-02 -9.9006E-03 A6= -2.2361E-04 -5.8308E-04
1.6315E-02 2.2302E-02 A8= 4.3334E-04 6.3359E-03 3.7605E-03
-2.3288E-03 A10= -1.2374E-04 -3.7756E-03 -6.3530E-03 -1.4855E-03
A12= 2.2772E-05 1.0139E-03 2.0591E-03 2.6942E-04 A14= -1.0486E-04
-2.4501E-04 Surface # 6 7 8 9 k= 9.0000E+01 6.6519E+01 2.5817E+01
-8.4270E+00 A4= -2.3023E-03 3.0937E-04 6.5712E-04 -2.5994E-04 A6=
5.5290E-03 4.9138E-03 7.2110E-04 2.1448E-04 A8= 4.0094E-03
2.1381E-03 7.8495E-05 -4.2925E-05 A10= -2.6329E-03 -1.3898E-03 A12=
6.3474E-04 3.5156E-04 A14= -6.6888E-05 -3.9688E-05 Surface # 10 11
12 13 k= 2.9378E+01 -4.0266E-01 5.8552E+01 -9.0000E+01 A4=
-3.2851E-02 -4.0133E-02 -1.8095E-02 -2.0123E-02 A6= -3.6064E-03
3.2000E-03 7.6026E-03 6.2807E-03 A8= 2.4620E-03 9.5742E-04
-1.5094E-03 -1.0107E-03 A10= -4.0408E-04 -3.1231E-04 1.5869E-04
9.1568E-05 A12= 1.3844E-05 3.7562E-05 -9.8999E-06 -4.9274E-06 A14=
2.6644E-06 -2.1371E-06 3.5226E-07 1.4504E-07 A16= -1.8910E-07
4.8404E-08 -6.4370E-09 -1.8303E-09
[0129] In the 3rd embodiment, the equation of the aspheric surface
profiles of the aforementioned lens elements is the same as the
equation of the 1st embodiment. Also, the definitions of these
parameters shown in TABLE 8 below are the same as those stated in
the 1st embodiment with corresponding values for the 3rd
embodiment, so an explanation in this regard will not be provided
again.
[0130] Moreover, these parameters can be calculated from TABLE 6
and TABLE 7 and satisfy the conditions stated in TABLE 8.
TABLE-US-00008 TABLE 8 3rd Embodiment f [mm] 10.64 (R5-R6)/(R5+R6)
1.80 Fno 2.90 (R11 + R12)/(R11 - R12) -0.55 HFOV [deg.] 19.0
(|f/f3| + |f/f4|)/|f/f2| 0.71 V6 23.5 Yc52/f 0.19 (V2 + V3)/V1 0.84
TL/f 1.00 Nmax 1.639 SD/TD 0.93 T56/T45 0.17 BL/TD 0.13 (T12 +
T56)/(T23 + T34 + T45) 0.21 f/ImgH 2.80 f/R1 3.88 EPD/ImgH 0.97
f/R10 2.86 tan(2*HFOV) 0.78 (R1 + R12)/(R1 - R12) -0.94 TL/(Y62 -
Y11) 7.29
4th Embodiment
[0131] FIG. 4A is a schematic view of an image capturing apparatus
according to the 4th embodiment of the present disclosure. FIG. 4B
shows, in order from left to right, longitudinal spherical
aberration curves, astigmatic field curves and a distortion curve
of the image capturing apparatus according to the 4th
embodiment.
[0132] In FIG. 4A, the image capturing apparatus includes an image
capturing lens system (not otherwise herein labeled) of the present
disclosure and an image sensor 490. The image capturing lens system
includes, in order from an object side to an image side, an
aperture stop 400, a first lens element 410, a second lens element
420, a third lens element 430, a fourth lens element 440, a fifth
lens element 450, and a sixth lens element 460.
[0133] The first lens element 410 with positive refractive power
has an object-side surface 411 being convex in a paraxial region
thereof and an image-side surface 412 being concave in a paraxial
region thereof, which are both aspheric, and the first lens element
410 is made of plastic material.
[0134] The second lens element 420 with negative refractive power
has an object-side surface 421 being convex in a paraxial region
thereof and an image-side surface 422 being concave in a paraxial
region thereof, which are both aspheric, and the second lens
element 420 is made of plastic material.
[0135] The third lens element 430 with negative refractive power
has an object-side surface 431 being concave in a paraxial region
thereof and an image-side surface 432 being convex in a paraxial
region thereof, which are both aspheric and have inflection points.
The third lens element 430 is made of plastic material.
[0136] The fourth lens element 440 with positive refractive power
has an object-side surface 441 being convex in a paraxial region
thereof and an image-side surface 442 being convex in a paraxial
region thereof, which are both aspheric, and the fourth lens
element 440 is made of plastic material.
[0137] The fifth lens element 450 with negative refractive power
has an object-side surface 451 being convex in a paraxial region
thereof and an image-side surface 452 being concave in a paraxial
region thereof, which are both aspheric and have inflection points.
The fifth lens element 450 is made of plastic material.
[0138] The sixth lens element 460 with positive refractive power
has an object-side surface 461 being concave in a paraxial region
thereof and an image-side surface 462 being convex in a paraxial
region thereof, which are both aspheric, and the sixth lens element
460 is made of plastic material.
[0139] The image capturing lens system further includes an IR cut
filter 470 located between the sixth lens element 460 and an image
surface 480. The IR cut filter 470 is made of glass material and
will not affect the focal length of the image capturing lens
system. The image sensor 490 is disposed on or near the image
surface 480 of the image capturing lens system.
[0140] The detailed optical data of the 4th embodiment are shown in
TABLE 9, and the aspheric surface data are shown in TABLE 10,
wherein the units of the curvature radius, the thickness and the
focal length are expressed in mm, and HFOV is a half of the maximal
field of view.
TABLE-US-00009 TABLE 9 (4th Embodiment) f = 5.58 mm, Fno = 2.75,
HFOV = 19.0 deg, Surface # Curvature Radius Thickness Material
Index Abbe # Focal Length 0 Object Plano Infinity 1 Ape. Stop Plano
-0.400 2 Lens 1 1.546 ASP 0.815 Plastic 1.544 55.9 3.12 3 14.091
ASP 0.155 4 Lens 2 9.543 ASP 0.205 Plastic 1.639 23.5 -5.69 5 2.611
ASP 0.371 6 Lens 3 -11.347 ASP 0.205 Plastic 1.639 23.5 -29.12 7
-29.285 ASP 0.152 8 Lens 4 15.165 ASP 1.300 Plastic 1.544 55.9
11.96 9 -11.051 ASP 0.849 10 Lens 5 10.518 ASP 0.414 Plastic 1.544
55.9 -4.76 11 2.048 ASP 0.117 12 Lens 6 -186.178 ASP 0.842 Plastic
1.639 23.5 95.19 13 -45.930 ASP 0.230 14 IR Cut Filter Plano 0.185
Glass 1.517 64.2 15 Plano 0.083 16 Image Surface Plano -- Note:
Reference wavelength is d-line 587.6 nm
TABLE-US-00010 TABLE 10 Aspheric Coefficients Surface # 2 3 4 5 k=
-4.7011E-02 8.9405E+01 8.1022E+01 -3.8316E+00 A4= 1.0072E-02
-1.9114E-02 -1.4665E-01 -7.0331E-02 A6= -4.0708E-03 7.7240E-03
3.6014E-01 4.9295E-01 A8= 3.4011E-02 4.7162E-01 2.8994E-01
-1.7166E-01 A10= -3.0225E-02 -1.0013E+00 -1.6634E+00 -3.9175E-01
A12= 1.7505E-02 9.0859E-01 1.8227E+00 2.2188E-01 A14= -3.3097E-01
-7.5139E-01 Surface # 6 7 8 9 k= 6.9809E+01 -9.0000E+01 5.4223E+01
6.3041E+01 A4= -2.5860E-02 1.6955E-03 6.9458E-04 -1.7483E-02 A6=
1.2732E-01 9.3010E-02 2.1789E-02 7.8075E-03 A8= 3.0614E-01
1.5970E-01 -2.3084E-04 6.4803E-04 A10= -6.8486E-01 -3.6935E-01 A12=
5.7185E-01 3.1343E-01 A14= -2.0705E-01 -1.0660E-01 Surface # 10 11
12 13 k = 4.4270E+01 -3.8960E-01 -9.0000E+01 -9.0000E+01 A4 =
-2.1155E-01 -2.4264E-01 -7.7637E-02 -9.7173E-02 A6 = -7.8642E-02
6.3585E-02 1.5508E-01 1.2805E-01 A8 = 1.8052E-01 7.3255E-02
-1.1280E-01 -7.5323E-02 A10 = -1.0363E-01 -8.1094E-02 4.2033E-02
2.4102E-02 A12 = 1.4168E-02 3.3897E-02 -8.8192E-03 -4.4341E-03 A14
= 8.5045E-03 -6.6183E-03 1.0860E-03 4.4537E-04 A16 = -2.6762E-03
4.9559E-04 -7.3663E-05 -1.9787E-05
[0141] In the 4th embodiment, the equation of the aspheric surface
profiles of the aforementioned lens elements is the same as the
equation of the 1st embodiment. Also, the definitions of these
parameters shown in TABLE 11 below are the same as those stated in
the 1st embodiment with corresponding values for the 4th
embodiment, so an explanation in this regard will not be provided
again.
[0142] Moreover, these parameters can be calculated from TABLE 9
and TABLE 10 and satisfy the conditions stated in TABLE 11.
TABLE-US-00011 TABLE 11 4th Embodiment f [mm] 5.58 (R5 - R6)/(R5 +
R6) -0.44 Fno 2.75 (R11 + R12)/(R11 - R12) 1.65 HFOV [deg.] 19.0
(|f/f3| + |f/f4|)/|f/f2| 0.67 V6 23.5 Yc52/f 0.21 (V2 + V3)/V1 0.84
TL/f 1.06 Nmax 1.639 SD/TD 0.93 T56/T45 0.14 BL/TD 0.09 (T12 +
T56)/(T23 + T34 + T45) 0.20 f/ImgH 2.79 f/R1 3.61 EPD/ImgH 1.01
f/R10 2.72 tan(2*HFOV) 0.78 (R1 + R12)/(R1 - R12) -0.93 TL/(Y62 -
Y11) 7.54
5th Embodiment
[0143] FIG. 5A is a schematic view of an image capturing apparatus
according to the 5th embodiment of the present disclosure. FIG. 5B
shows, in order from left to right, longitudinal spherical
aberration curves, astigmatic field curves and a distortion curve
of the image capturing apparatus according to the 5th
embodiment.
[0144] In FIG. 5A, the image capturing apparatus includes an image
capturing lens system (not otherwise herein labeled) of the present
disclosure and an image sensor 590. The image capturing lens system
includes, in order from an object side to an image side, an
aperture stop 500, a first lens element 510, a second lens element
520, a third lens element 530, a fourth lens element 540, a fifth
lens element 550, and a sixth lens element 560.
[0145] The first lens element 510 with positive refractive power
has an object-side surface 511 being convex in a paraxial region
thereof and an image-side surface 512 being concave in a paraxial
region thereof, which are both aspheric, and the first lens element
510 is made of plastic material.
[0146] The second lens element 520 with negative refractive power
has an object-side surface 521 being convex in a paraxial region
thereof and an image-side surface 522 being concave in a paraxial
region thereof, which are both aspheric, and the second lens
element 520 is made of plastic material.
[0147] The third lens element 530 with negative refractive power
has an object-side surface 531 being concave in a paraxial region
thereof and an image-side surface 532 being convex in a paraxial
region thereof, which are both aspheric and have inflection points.
The third lens element 530 is made of plastic material.
[0148] The fourth lens element 540 with positive refractive power
has an object-side surface 541 being convex in a paraxial region
thereof and an image-side surface 542 being convex in a paraxial
region thereof, which are both aspheric, and the fourth lens
element 540 is made of plastic material.
[0149] The fifth lens element 550 with negative refractive power
has an object-side surface 551 being convex in a paraxial region
thereof and an image-side surface 552 being concave in a paraxial
region thereof, which are both aspheric and have inflection points.
The fifth lens element 550 is made of plastic material.
[0150] The sixth lens element 560 with positive refractive power
has an object-side surface 561 being convex in a paraxial region
thereof and an image-side surface 562 being convex in a paraxial
region thereof, which are both aspheric, and the sixth lens element
560 is made of plastic material.
[0151] The image capturing lens system further includes an IR cut
filter 570 located between the sixth lens element 560 and an image
surface 580. The IR cut filter 570 is made of glass material and
will not affect the focal length of the image capturing lens
system. The image sensor 590 is disposed on or near the image
surface 580 of the image capturing lens system.
[0152] The detailed optical data of the 5th embodiment are shown in
TABLE 12, and the aspheric surface data are shown in TABLE 13,
wherein the units of the curvature radius, the thickness and the
focal length are expressed in mm, and HFOV is a half of the maximal
field of view.
TABLE-US-00012 TABLE 12 (5th Embodiment) f = 6.91 mm, Fno = 2.60,
HFOV = 17.0 deg, Surface # Curvature Radius Thickness Material
Index Abbe # Focal Length 0 Object Plano Infinity 1 Ape. Stop Plano
-0.464 2 Lens 1 2.065 ASP 1.038 Plastic 1.544 56.0 3.85 3 117.832
ASP 0.162 4 Lens 2 11.220 ASP 0.174 Plastic 1.639 23.5 -7.04 5
3.191 ASP 0.480 6 Lens 3 -9.505 ASP 0.314 Plastic 1.639 23.5 -53.41
7 -13.347 ASP 0.777 8 Lens 4 58.409 ASP 0.847 Plastic 1.544 56.0
14.33 9 -8.955 ASP 1.311 10 Lens 5 28.954 ASP 0.538 Plastic 1.530
55.8 -4.83 11 2.336 ASP 0.136 12 Lens 6 18.159 ASP 0.671 Plastic
1.660 20.4 21.86 13 -69.232 ASP 0.320 14 IR Cut Filter Plano 0.224
Glass 1.517 64.2 15 Plano 0.240 16 Image Surface Plano -- Note:
Reference wavelength is d-line 587.6 nm
TABLE-US-00013 TABLE 13 Aspheric Coefficients Surface # 2 3 4 5 k=
-6.6026E-02 -9.0000E+01 8.2722E+01 -3.4351E+00 A4= 4.6153E-03
-6.9674E-03 -8.4746E-02 -4.3567E-02 A6= -1.0131E-03 1.2489E-04
1.4275E-01 1.8481E-01 A8= 9.0680E-03 1.2745E-01 7.6595E-02
-4.8418E-02 A10= -5.8063E-03 -1.8417E-01 -3.0862E-01 -7.3777E-02
A12= 2.0279E-03 1.1595E-01 2.3143E-01 2.7008E-02 A14= -2.8834E-02
-6.5222E-02 Surface # 6 7 8 9 k= 4.5463E+01 9.0000E+01 -6.5486E+01
1.2606E+01 A4= -1.3409E-02 -4.3843E-03 7.6047E-03 7.3818E-04 A6=
4.9674E-02 3.4562E-02 1.2283E-02 5.4036E-03 A8= 8.2393E-02
4.3081E-02 -1.7263E-03 1.0641E-03 A10= -1.2616E-01 -6.7770E-02 A12=
7.3210E-02 4.0342E-02 A14= -1.7538E-02 -8.9785E-03 Surface # 10 11
12 13 k= 9.0000E+01 -3.1661E-01 -4.2455E+01 -9.0000E+01 A4=
-1.3020E-01 -1.6401E-01 -4.4497E-02 -3.2959E-02 A6= -3.0898E-02
2.6925E-02 6.2257E-02 4.7905E-02 A8= 4.7912E-02 1.9969E-02
-3.0313E-02 -2.0905E-02 A10= -1.8885E-02 -1.4977E-02 7.7447E-03
4.5623E-03 A12= 1.9467E-03 4.3077E-03 -1.1290E-03 -5.5543E-04 A14=
7.6725E-04 -5.7821E-04 9.4109E-05 3.8858E-05 A16= -1.7120E-04
2.9477E-05 -3.9279E-06 -1.5115E-06
[0153] In the 5th embodiment, the equation of the aspheric surface
profiles of the aforementioned lens elements is the same as the
equation of the 1st embodiment. Also, the definitions of these
parameters shown in TABLE 14 below are the same as those stated in
the 1st embodiment with corresponding values for the 5th
embodiment, so an explanation in this regard will not be provided
again.
[0154] Moreover, these parameters can be calculated from TABLE 12
and TABLE 13 and satisfy the conditions stated in TABLE 14.
TABLE-US-00014 TABLE 14 5th Embodiment f [mm] 6.91 (R5 - R6)/(R5 +
R6) -0.17 Fno 2.60 (R11 + R12)/(R11 - R12) -0.58 HFOV [deg.] 17.0
(|f/f3| + |f/f4|)/|f/f2| 0.62 V6 20.4 Yc52/f 0.15 (V2 + V3)/V1 0.84
TL/f 1.05 Nmax 1.660 SD/TD 0.93 T56/T45 0.10 BL/TD 0.12 (T12 +
T56)/(T23 + T34 + T45) 0.12 f/ImgH 3.13 f/R1 3.34 EPD/ImgH 1.20
f/R10 2.96 tan(2*HFOV) 0.67 (R1 + R12)/(R1 - R12) -0.94 TL/(Y62 -
Y11) 10.71
6th Embodiment
[0155] FIG. 6A is a schematic view of an image capturing apparatus
according to the 6th embodiment of the present disclosure. FIG. 6B
shows, in order from left to right, longitudinal spherical
aberration curves, astigmatic field curves and a distortion curve
of the image capturing apparatus according to the 6th
embodiment.
[0156] In FIG. 6A, the image capturing apparatus includes an image
capturing lens system (not otherwise herein labeled) of the present
disclosure and an image sensor 690. The image capturing lens system
includes, in order from an object side to an image side, an
aperture stop 600, a first lens element 610, a second lens element
620, a third lens element 630, a fourth lens element 640, a fifth
lens element 650, and a sixth lens element 660.
[0157] The first lens element 610 with positive refractive power
has an object-side surface 611 being convex in a paraxial region
thereof and an image-side surface 612 being concave in a paraxial
region thereof, which are both aspheric, and the first lens element
610 is made of plastic material.
[0158] The second lens element 620 with negative refractive power
has an object-side surface 621 being convex in a paraxial region
thereof and an image-side surface 622 being concave in a paraxial
region thereof, which are both aspheric, and the second lens
element 620 is made of plastic material.
[0159] The third lens element 630 with negative refractive power
has an object-side surface 631 being convex in a paraxial region
thereof and an image-side surface 632 being concave in a paraxial
region thereof, which are both aspheric. The third lens element 630
is made of plastic material and the object-side surface 631 of
which has inflection points.
[0160] The fourth lens element 640 with positive refractive power
has an object-side surface 641 being convex in a paraxial region
thereof and an image-side surface 642 being convex in a paraxial
region thereof, which are both aspheric, and the fourth lens
element 640 is made of plastic material.
[0161] The fifth lens element 650 with negative refractive power
has an object-side surface 651 being convex in a paraxial region
thereof and an image-side surface 652 being concave in a paraxial
region thereof, which are both aspheric and have inflection points.
The fifth lens element 650 is made of plastic material.
[0162] The sixth lens element 660 with positive refractive power
has an object-side surface 661 being convex in a paraxial region
thereof and an image-side surface 662 being convex in a paraxial
region thereof, which are both aspheric, and the sixth lens element
660 is made of plastic material.
[0163] The image capturing lens system further includes an IR cut
filter 670 located between the sixth lens element 660 and an image
surface 680. The IR cut filter 670 is made of glass material and
will not affect the focal length of the image capturing lens
system. The image sensor 690 is disposed on or near the image
surface 680 of the image capturing lens system.
[0164] The detailed optical data of the 6th embodiment are shown in
TABLE 15, and the aspheric surface data are shown in TABLE 16,
wherein the units of the curvature radius, the thickness and the
focal length are expressed in mm, and HFOV is a half of the maximal
field of view.
TABLE-US-00015 TABLE 15 (6th Embodiment) f = 10.29 mm, Fno = 2.65,
HFOV = 16.6 deg, Surface # Curvature Radius Thickness Material
Index Abbe # Focal Length 0 Object Plano Infinity 1 Ape. Stop Plano
-0.700 2 Lens 1 2.969 ASP 1.573 Plastic 1.535 55.8 5.95 3 36.121
ASP 0.262 4 Lens 2 17.158 ASP 0.270 Plastic 1.639 23.3 -9.20 5
4.349 ASP 0.715 6 Lens 3 84.911 ASP 0.633 Plastic 1.530 55.8 -92.17
7 30.928 ASP 0.854 8 Lens 4 21.778 ASP 0.958 Plastic 1.530 55.8
16.36 9 -14.185 ASP 2.428 10 Lens 5 43.652 ASP 0.894 Plastic 1.530
55.8 -6.92 11 3.358 ASP 0.218 12 Lens 6 33.517 ASP 1.189 Plastic
1.639 23.3 17.26 13 -16.204 ASP 0.300 14 IR Cut Filter Plano 0.300
Glass 1.517 64.2 15 Plano 0.281 16 Image Surface Plano -- Note:
Reference wavelength is d-line 587.6 nm
TABLE-US-00016 TABLE 16 Aspheric Coefficients Surface # 2 3 4 5 k=
-7.4986E-02 9.0000E+01 8.3391E+01 -2.9661E+00 A4= 1.1651E-03
-2.3906E-03 -2.2896E-02 -1.1158E-02 A6= -1.8684E-04 9.5710E-05
1.6533E-02 2.1756E-02 A8= 4.3820E-04 6.2465E-03 3.7720E-03
-2.3316E-03 A10= -1.1942E-04 -3.8193E-03 -6.3869E-03 -1.5179E-03
A12= 1.8372E-05 1.0129E-03 2.0260E-03 2.3921E-04 A14= -1.0708E-04
-2.4115E-04 Surface # 6 7 8 9 k= -9.0000E+01 8.5447E+01 -2.8282E+01
3.0780E+01 A4= -4.9618E-03 3.5629E-04 3.9064E-04 -1.8265E-03 A6=
5.7146E-03 4.2327E-03 1.1892E-03 2.8991E-04 A8= 4.0341E-03
2.1346E-03 -6.9347E-05 5.1120E-05 A10= -2.6169E-03 -1.4028E-03
1.2647E-06 -2.1167E-07 A12= 6.3931E-04 3.5252E-04 A14= -6.5230E-05
-3.3367E-05 Surface # 10 11 12 13 k= -8.0856E+01 -9.0330E-02
-5.5110E+01 6.2595E+00 A4= -3.0613E-02 -4.2786E-02 -1.0456E-02
-1.3095E-03 A6= -3.3756E-03 3.1872E-03 7.0995E-03 4.3723E-03 A8=
2.3475E-03 9.7461E-04 -1.4845E-03 -9.4105E-04 A10= -3.9401E-04
-3.1169E-04 1.6146E-04 9.3942E-05 A12= 1.6791E-05 3.7566E-05
-9.8693E-06 -4.9655E-06 A14= 2.8211E-06 -2.1410E-06 3.4418E-07
1.4599E-07 A16= -2.7409E-07 4.6970E-08 -6.6109E-09 -2.8962E-09
[0165] In the 6th embodiment, the equation of the aspheric surface
profiles of the aforementioned lens elements is the same as the
equation of the 1st embodiment. Also, the definitions of these
parameters shown in TABLE 17 below are the same as those stated in
the 1st embodiment with corresponding values for the 6th
embodiment, so an explanation in this regard will not be provided
again.
[0166] Moreover, these parameters can be calculated from TABLE 15
and TABLE 16 and satisfy the conditions stated in TABLE 17.
TABLE-US-00017 TABLE 17 6th Embodiment f [mm] 10.29 (R5 - R6)/(R5 +
R6) 0.47 Fno 2.65 (R11 + R12)/(R11 - R12) 0.35 HFOV [deg.] 16.6
(|f/f3| + |f/f4|)/|f/f2| 0.66 V6 23.3 Yc52/f (V2 + V3)/V1 1.42 TL/f
1.06 Nmax 1.639 SD/TD 0.93 T56/T45 0.09 BL/TD 0.09 (T12 + T56)/(T23
+ T34 + T45) 0.12 f/ImgH 3.21 f/R1 3.46 EPD/ImgH 1.21 f/R10 3.06
tan(2*HFOV) 0.65 (R1 + R12)/(R1 - R12) -0.69 TL/(Y62 - Y11)
10.84
7th Embodiment
[0167] FIG. 7A is a schematic view of an image capturing apparatus
according to the 7th embodiment of the present disclosure. FIG. 7B
shows, in order from left to right, longitudinal spherical
aberration curves, astigmatic field curves and a distortion curve
of the image capturing apparatus according to the 7th
embodiment.
[0168] In FIG. 7A, the image capturing apparatus includes an image
capturing lens system (not otherwise herein labeled) of the present
disclosure and an image sensor 790. The image capturing lens system
includes, in order from an object side to an image side, a first
lens element 710, an aperture stop 700, a second lens element 720,
a third lens element 730, a fourth lens element 740, a fifth lens
element 750, and a sixth lens element 760.
[0169] The first lens element 710 with positive refractive power
has an object-side surface 711 being convex in a paraxial region
thereof and an image-side surface 712 being concave in a paraxial
region thereof, which are both aspheric, and the first lens element
710 is made of plastic material.
[0170] The second lens element 720 with negative refractive power
has an object-side surface 721 being convex in a paraxial region
thereof and an image-side surface 722 being concave in a paraxial
region thereof, which are both aspheric, and the second lens
element 720 is made of plastic material.
[0171] The third lens element 730 with positive refractive power
has an object-side surface 731 being convex in a paraxial region
thereof and an image-side surface 732 being convex in a paraxial
region thereof, which are both aspheric and have inflection points.
The third lens element 730 is made of plastic material.
[0172] The fourth lens element 740 with positive refractive power
has an object-side surface 741 being concave in a paraxial region
thereof and an image-side surface 742 being convex in a paraxial
region thereof, which are both aspheric, and the fourth lens
element 740 is made of plastic material.
[0173] The fifth lens element 750 with negative refractive power
has an object-side surface 751 being convex in a paraxial region
thereof and an image-side surface 752 being concave in a paraxial
region thereof, which are both aspheric and have inflection points.
The fifth lens element 750 is made of plastic material.
[0174] The sixth lens element 760 with positive refractive power
has an object-side surface 761 being convex in a paraxial region
thereof and an image-side surface 762 being convex in a paraxial
region thereof, which are both aspheric, and the sixth lens element
760 is made of plastic material.
[0175] The image capturing lens system further includes an IR cut
filter 770 located between the sixth lens element 760 and an image
surface 780. The IR cut filter 770 is made of glass material and
will not affect the focal length of the image capturing lens
system. The image sensor 790 is disposed on or near the image
surface 780 of the image capturing lens system.
[0176] The detailed optical data of the 7th embodiment are shown in
TABLE 18, and the aspheric surface data are shown in TABLE 19,
wherein the units of the curvature radius, the thickness and the
focal length are expressed in mm, and HFOV is a half of the maximal
field of view.
TABLE-US-00018 TABLE 18 (7th Embodiment) f = 5.32 mm, Fno = 2.90,
HFOV = 17.7 deg, Surface # Curvature Radius Thickness Material
Index Abbe # Focal Length 0 Object Plano Infinity 1 Lens 1 1.592
ASP 0.865 Plastic 1.535 55.8 3.24 2 15.551 ASP 0.090 3 Ape. Stop
Plano 0.000 4 Lens 2 9.569 ASP 0.145 Plastic 1.633 23.4 -4.99 5
2.362 ASP 0.369 6 Lens 3 312.064 ASP 0.342 Plastic 1.530 55.8 36.58
7 -20.665 ASP 0.297 8 Lens 4 -1946.05 ASP 0.518 Plastic 1.530 55.8
13.83 9 -7.303 ASP 1.394 10 Lens 5 9.247 ASP 0.482 Plastic 1.514
56.8 -4.34 11 1.766 ASP 0.109 12 Lens 6 13.578 ASP 0.593 Plastic
1.639 23.3 17.71 13 -66.641 ASP 0.230 14 IR Cut Filter Plano 0.165
Glass 1.517 64.2 15 Plano 0.091 16 Image Surface Plano -- Note:
Reference wavelength is d-line 587.6 nm
TABLE-US-00019 TABLE 19 Aspheric Coefficients Surface # 1 2 4 5 k=
-2.5132E-02 8.5297E+01 8.1337E+01 -3.0776E+00 A4= 1.0186E-02
-1.2236E-02 -1.3874E-01 -6.7255E-02 A6= -7.0641E-03 8.8111E-03
3.2515E-01 4.3497E-01 A8= 2.9171E-02 4.0650E-01 2.5039E-01
-1.5554E-01 A10= -2.5492E-02 -8.3341E-01 -1.3843E+00 -3.3494E-01
A12= 1.4564E-02 7.6893E-01 1.4322E+00 1.7974E-01 A14= -3.0796E-01
-5.4095E-01 Surface # 6 7 8 9 k= -9.0000E+01 -7.1654E+01 9.0000E+01
3.0656E+01 A4= -3.1413E-02 2.8313E-03 1.3249E-03 -1.1078E-02 A6=
1.1386E-01 8.2738E-02 2.3430E-02 5.6798E-03 A8= 2.6692E-01
1.3806E-01 -4.8133E-03 3.5729E-03 A10= -5.6639E-01 -3.0693E-01
-4.3114E-05 1.4912E-04 A12= 4.5620E-01 2.5174E-01 A14= -1.6375E-01
-7.6970E-02 Surface # 10 11 12 13 k= -3.9272E+01 -1.5174E-01
5.4004E+01 9.0000E+01 A4= -1.8675E-01 -2.5697E-01 -6.2043E-02
-3.0781E-02 A6= -6.5742E-02 6.0816E-02 1.3525E-01 9.0619E-02 A8=
1.5379E-01 6.4143E-02 -9.6244E-02 -6.0158E-02 A10= -8.5753E-02
-6.7558E-02 3.5069E-02 1.9530E-02 A12= 1.1999E-02 2.7002E-02
-7.1187E-03 -3.4860E-03 A14= 6.6836E-03 -5.0795E-03 8.1125E-04
3.6030E-04 A16= -2.1514E-03 3.6109E-04 -5.0376E-05 -2.4081E-05
[0177] In the 7th embodiment, the equation of the aspheric surface
profiles of the aforementioned lens elements is the same as the
equation of the 1st embodiment. Also, the definitions of these
parameters shown in TABLE 20 below are the same as those stated in
the 1st embodiment with corresponding values for the 7th
embodiment, so an explanation in this regard will not be provided
again.
[0178] Moreover, these parameters can be calculated from TABLE 18
and TABLE 19 and satisfy the conditions stated in TABLE 20.
TABLE-US-00020 TABLE 20 7th Embodiment f [mm] 5.32 (R5 - R6)/(R5 +
R6) 1.14 Fno 2.90 (R11 + R12)/(R11 - R12) -0.66 HFOV [deg.] 17.7
(|f/f3| + |f/f4|)/|f/f2| 0.50 V6 23.3 Yc52/f (V2 + V3)/V1 1.42 TL/f
1.07 Nmax 1.639 SD/TD 0.82 T56/T45 0.08 BL/TD 0.09 (T12 + T56)/(T23
+ T34 + T45) 0.10 f/ImgH 3.02 f/R1 3.34 EPD/ImgH 1.04 f/R10 3.01
tan(2*HFOV) 0.71 (R1 + R12)/(R1 - R12) -0.95 TL/(Y62 - Y11)
9.86
8th Embodiment
[0179] FIG. 8A is a schematic view of an image capturing apparatus
according to the 8th embodiment of the present disclosure. FIG. 8B
shows, in order from left to right, longitudinal spherical
aberration curves, astigmatic field curves and a distortion curve
of the image capturing apparatus according to the 8th
embodiment.
[0180] In FIG. 8A, the image capturing apparatus includes an image
capturing lens system (not otherwise herein labeled) of the present
disclosure and an image sensor 890. The image capturing lens system
includes, in order from an object side to an image side, a first
lens element 810, a second lens element 820, an aperture stop 800,
a third lens element 830, a fourth lens element 840, a fifth lens
element 850, and a sixth lens element 860, wherein the image
capturing lens system has a total of six lens elements with
refractive power.
[0181] The first lens element 810 with positive refractive power
has an object-side surface 811 being convex in a paraxial region
thereof and an image-side surface 812 being concave in a paraxial
region thereof, which are both aspheric, and the first lens element
810 is made of plastic material.
[0182] The second lens element 820 with negative refractive power
has an object-side surface 821 being convex in a paraxial region
thereof and an image-side surface 822 being concave in a paraxial
region thereof, which are both aspheric, and the second lens
element 820 is made of plastic material.
[0183] The third lens element 830 with positive refractive power
has an object-side surface 831 being concave in a paraxial region
thereof and an image-side surface 832 being convex in a paraxial
region thereof, which are both aspheric and have inflection points.
The third lens element 830 is made of plastic material.
[0184] The fourth lens element 840 with positive refractive power
has an object-side surface 841 being convex in a paraxial region
thereof and an image-side surface 842 being convex in a paraxial
region thereof, which are both aspheric, and the fourth lens
element 840 is made of plastic material.
[0185] The fifth lens element 850 with negative refractive power
has an object-side surface 851 being convex in a paraxial region
thereof and an image-side surface 852 being concave in a paraxial
region thereof, which are both aspheric and have inflection points.
The fifth lens element 850 is made of plastic material.
[0186] The sixth lens element 860 with positive refractive power
has an object-side surface 861 being convex in a paraxial region
thereof and an image-side surface 862 being convex in a paraxial
region thereof, which are both aspheric, and the sixth lens element
860 is made of plastic material.
[0187] The image capturing lens system further includes an IR cut
filter 870 located between the sixth lens element 860 and an image
surface 880. The IR cut filter 870 is made of glass material and
will not affect the focal length of the image capturing lens
system. The image sensor 890 is disposed on or near the image
surface 880 of the image capturing lens system.
[0188] The detailed optical data of the 8th embodiment are shown in
TABLE 21, and the aspheric surface data are shown in TABLE 22,
wherein the units of the curvature radius, the thickness and the
focal length are expressed in mm, and HFOV is a half of the maximal
field of view.
TABLE-US-00021 TABLE 21 (8th Embodiment) f = 9.37 mm, Fno = 2.80,
HFOV = 18.2 deg, Surface # Curvature Radius Thickness Material
Index Abbe # Focal Length 0 Object Plano Infinity 1 Lens 1 2.944
ASP 1.337 Plastic 1.535 55.8 5.96 2 32.433 ASP 0.130 3 Lens 2
16.685 ASP 0.270 Plastic 1.633 23.4 -9.35 4 4.340 ASP 0.248 5 Ape.
Stop Plano 0.332 6 Lens 3 -1238.420 ASP 0.393 Plastic 1.614 25.6
93.75 7 -55.032 ASP 0.098 8 Lens 4 118.867 ASP 1.573 Plastic 1.530
55.8 21.86 9 -12.780 ASP 3.276 10 Lens 5 11.369 ASP 0.733 Plastic
1.514 56.8 -8.44 11 3.068 ASP 0.219 12 Lens 6 47.346 ASP 0.716
Plastic 1.639 23.3 46.79 13 -80.572 ASP 0.400 14 IR Cut Filter
Plano 0.300 Glass 1.517 64.2 15 Plano 0.180 16 Image Surface Plano
-- Note: Reference wavelength is d-line 587.6 nm
TABLE-US-00022 TABLE 22 Aspheric Coefficients Surface # 1 2 4 5 k=
-1.3436E-02 7.9063E+01 8.0548E+01 -3.9473E+00 A4= 1.8194E-03
-1.9527E-03 -2.2445E-02 -1.1801E-02 A6= -4.0500E-04 7.0872E-04
1.6305E-02 2.2058E-02 A8= 4.2554E-04 6.1132E-03 3.8253E-03
-2.2828E-03 A10= -1.1124E-04 -3.9588E-03 -6.3475E-03 -1.5183E-03
A12= 1.9278E-05 1.0271E-03 1.9993E-03 2.5956E-04 A14= -1.0911E-04
-2.3944E-04 Surface # 6 7 8 9 k= -9.0000E+01 -3.7777E+01
-9.0000E+01 3.0431E+01 A4= -5.4089E-03 6.7595E-04 -2.1899E-04
-1.0723E-03 A6= 5.5763E-03 4.2118E-03 1.1739E-03 1.9454E-04 A8=
4.0348E-03 2.0995E-03 -5.6603E-05 3.2783E-05 A10= -2.6090E-03
-1.4210E-03 8.8356E-06 -1.1214E-06 A12= 6.3559E-04 3.4776E-04 A14=
-7.0371E-05 -3.2797E-05 Surface # 10 11 12 13 k= -7.5973E+01
-1.0837E-01 7.8295E+01 9.0000E+01 A4= -3.2499E-02 -4.8505E-02
-7.2141E-03 -1.4624E-03 A6= -3.5629E-03 3.0750E-03 6.5107E-03
4.2980E-03 A8= 2.3218E-03 9.7845E-04 -1.4580E-03 -9.2311E-04 A10=
-3.9490E-04 -3.1113E-04 1.6226E-04 8.9584E-05 A12= 1.6935E-05
3.7568E-05 -9.9109E-06 -4.6537E-06 A14= 2.8334E-06 -2.1504E-06
3.4043E-07 1.5050E-07 A16= -2.8454E-07 4.4713E-08 -6.5130E-09
-3.6972E-09
[0189] In the 8th embodiment, the equation of the aspheric surface
profiles of the aforementioned lens elements is the same as the
equation of the 1st embodiment. Also, the definitions of these
parameters shown in TABLE 23 below are the same as those stated in
the 1st embodiment with corresponding values for the 8th
embodiment, so an explanation in this regard will not be provided
again.
[0190] Moreover, these parameters can be calculated from TABLE 21
and TABLE 22 and satisfy the conditions stated in TABLE 23.
TABLE-US-00023 TABLE 23 8th Embodiment f [mm] 9.37 (R5 - R6)/(R5 +
R6) 0.91 Fno 2.80 (R11 + R12)/(R11 - R12) -0.26 HFOV [deg.] 18.2
(|f/f3| + |f/f4|)/|f/f2| 0.53 V6 23.3 Yc52/f 0.20 (V2 + V3)/V1 0.88
TL/f 1.09 Nmax 1.639 SD/TD 0.79 T56/T45 0.07 BL/TD 0.09 (T12 +
T56)/(T23 + T34 + T45) 0.09 f/ImgH 2.93 f/R1 3.18 EPD/ImgH 1.05
f/R10 3.05 tan(2*HFOV) 0.74 (R1 + R12)/(R1 - R12) -0.93 TL/(Y62 -
Y11) 9.96
[0191] The foregoing description, for purpose of explanation, has
been described with reference to specific embodiments. It is to be
noted that TABLES 1-23 show different data of the different
embodiments; however, the data of the different embodiments are
obtained from experiments. The embodiments were chosen and
described in order to best explain the principles of the disclosure
and its practical applications, and thereby to enable others
skilled in the art to best utilize the disclosure and various
embodiments with various modifications as are suited to the
particular use contemplated. The embodiments depicted above and the
appended drawings are exemplary and are not intended to be
exhaustive or to limit the scope of the present disclosure to the
precise forms disclosed. Many modifications and variations are
possible in view of the above teachings.
* * * * *